The pinion is fine you just need to move the ring gear away from the pinion gear a few thousands of an inch to give it some backlash. You measure it by putting an indicator on the ring gear and moving it back and forth without moving the pinion. That little bit of movement is your backlash.
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89 GT convertible, Kenny Brown level 5, Edelbrock performer, AFR 165's, Comp cams XE270HR, C&L 76, 24# inj, Crane 1.7's, 70mm BBK throttle body 298.2 hp 328.2 tq Mustang dyno
"Our lady of blessed acceleration don't fail me now" Elwood Blues
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